Remember, I'm testing them in Canon EF mount using a Commlite adaptor. Even, they function really well on the A7RII - just the occasional communication glitch (common even with Canon lenses).
They are very fast focusing, quite large, and well made along the same line as current Sigma ART lenses.

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They are £579 in the UK, each, and I wouldn't buy one although I like the results produced. My reason is simple, I have a Canon 40mm f/2.8 STM lens which cost me £95 and works extremely well with the Commlite. It's just as sharp, not much worse for bokeh, a quarter of the size and weight, takes small filters, and it has less longitudinal CA. In fact, it's the colour bokeh issue which bothers me most with the Tamrons - defocused edges in front of and behind the subject acquire colour casts I can not remove.
I've been doing some shots with my Sigma 70mm f/2.8 macro, which I had not used at all on the A7RII before this week, and apart from getting unexpectedly perfect focus with the LA-AE4 I'm surprised to see almost zero colour bokeh issue. The 45mm Tamron is better than the 35mm across the frame wide open, but I'm sure that the CZ 55mm f/1.8 at about the same current street price is a better deal. Biggest difference, the close focus. The Tamrons have really excellent close focus, the CZ 55mm is rubbish in this respect.